mpsimagelanczosscale(3) [mojave man page]
MPSImageLanczosScale(3) MetalPerformanceShaders.framework MPSImageLanczosScale(3) NAME
MPSImageLanczosScale SYNOPSIS
#import <MPSImageResampling.h> Inherits MPSImageScale. Instance Methods (nonnull instancetype) - initWithDevice: (nullable instancetype) - initWithCoder:device: Additional Inherited Members Detailed Description Resize an image and / or change its aspect ratio The MPSImageLanczosScale filter can be used to resample an existing image using a different sampling frequency in each dimension. This can be used to enlarge or reduce the size of an image, or change the aspect ratio of an image. The filter uses a Lanczos resampling algorithm which typically produces better quality for photographs, but is slower than linear sampling using the GPU texture units. Lanczos downsampling does not require a low pass filter to be applied before it is used. Because the resampling function has negative lobes, Lanczos can result in ringing near sharp edges, making it less suitable for vector art. Method Documentation - (nullable instancetype) initWithCoder: (NSCoder *__nonnull) aDecoder(nonnull id< MTLDevice >) device NSSecureCoding compatability While the standard NSSecureCoding/NSCoding method -initWithCoder: should work, since the file can't know which device your data is allocated on, we have to guess and may guess incorrectly. To avoid that problem, use initWithCoder:device instead. Parameters: aDecoder The NSCoder subclass with your serialized MPSKernel device The MTLDevice on which to make the MPSKernel Returns: A new MPSKernel object, or nil if failure. Reimplemented from MPSImageScale. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device Standard init with default properties per filter type Parameters: device The device that the filter will be used on. May not be NULL. Returns: a pointer to the newly initialized object. This will fail, returning nil if the device is not supported. Devices must be MTLFeatureSet_iOS_GPUFamily2_v1 or later. Reimplemented from MPSImageScale. Author Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code. Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageLanczosScale(3)
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MPSImageAreaMax(3) MetalPerformanceShaders.framework MPSImageAreaMax(3) NAME
MPSImageAreaMax SYNOPSIS
#import <MPSImageMorphology.h> Inherits MPSUnaryImageKernel. Inherited by MPSImageAreaMin. Instance Methods (nonnull instancetype) - initWithDevice:kernelWidth:kernelHeight: (nullable instancetype) - initWithCoder:device: (nonnull instancetype) - initWithDevice: Properties NSUInteger kernelHeight NSUInteger kernelWidth Additional Inherited Members Detailed Description MPSImageMorphology.h MetalPerformanceShaders Copyright: Copyright (c) 2015 Apple Inc. All rights reserved. MetalPerformanceShaders morphological operators The MPSImageAreaMax kernel finds the maximum pixel value in a rectangular region centered around each pixel in the source image. If there are multiple channels in the source image, each channel is processed independently. The edgeMode property is assumed to always be MPSImageEdgeModeClamp for this filter. Method Documentation - (nullable instancetype) initWithCoder: (NSCoder *__nonnull) aDecoder(nonnull id< MTLDevice >) device NSSecureCoding compatability While the standard NSSecureCoding/NSCoding method -initWithCoder: should work, since the file can't know which device your data is allocated on, we have to guess and may guess incorrectly. To avoid that problem, use initWithCoder:device instead. Parameters: aDecoder The NSCoder subclass with your serialized MPSKernel device The MTLDevice on which to make the MPSKernel Returns: A new MPSKernel object, or nil if failure. Reimplemented from MPSUnaryImageKernel. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device Standard init with default properties per filter type Parameters: device The device that the filter will be used on. May not be NULL. Returns: a pointer to the newly initialized object. This will fail, returning nil if the device is not supported. Devices must be MTLFeatureSet_iOS_GPUFamily2_v1 or later. Reimplemented from MPSUnaryImageKernel. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device(NSUInteger) kernelWidth(NSUInteger) kernelHeight Set the kernel height and width Parameters: device The device the filter will run on kernelWidth The width of the kernel. Must be an odd number. kernelHeight The height of the kernel. Must be an odd number. Property Documentation - kernelHeight [read], [nonatomic], [assign] The height of the filter window. Must be an odd number. - kernelWidth [read], [nonatomic], [assign] The width of the filter window. Must be an odd number. Author Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code. Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageAreaMax(3)